In a society of laws, there is a basis in morality and justice that has its roots from somewhere. Just where might that be? What gives us the guidance to know that murder, theft, rape, and fraud are wrong and subject to consequences? Shouldn't we all just be beholden by the rule of nature? Are other beasts judged as we are? Why not?

To ignore the uniqueness of human existance is to ignore its creator. For if there is no creator, why all the laws that bind us? By following the letter of the law you are already acknowledging a moral code that did not evolve from the primordial ooze.

Are you seriously going to lay out the case that murder is illegal only because it's prohibited by the bible? Does this mean that atheists cannot recognize that murder is reprehensible and wrong?